They were here. Again. No matter how many lifetimes or journeys through space it took, they always landed in this moment.
Living through aeons, turning time backward and forward, this one moment always returned to them. The history of their people, how they got here, and where they were going was still encapsulated here. It was their own blackbox, their own timecapsule, and hardly any could remember the pieces.
Each incarnation, a new person joined, a new face was added. Like time itself was assembling them. They remembered they came from Jupiter, and were meant to go back. They knew their settlements past had been covered by the ocean. They knew they had earthen basins protecting their supplies, things they needed to recreate their original vessels and return home. But they were still missing pieces of them, of their tribe, of their communal memory, before their home planet would accept them again.
They looked to the one leading them this lifetime. The one furious enough about the past to exact the change they all felt was coming, but were too scared to implement themselves.
His honesty got the balling rolling. Eventually, that momentum would lead them all home again. Back to their Solar Sun.